初學SSM+mybatis單元測試遇到的問題，dao注入後為null
  
   
    Dao層注入失敗，檢視後，發現註解都寫的無誤，經朋友的指點，
   
   
在測試類上加了一句“@RunWith(SpringJUnit4ClassRunner.class)  
   
@ContextConfiguration(locations={“classpath:spring/applicationContext-tx.xml”,“classpath:spring/applicationContext-service.xml”,“classpath:spring/applicationContext-dao.xml”})” 經測試，Dao可以注入，不再為null ---------------------  作者：旅途上的揹包客  來源：CSDN  原文：https://blog.csdn.net/u012799877/article/details/83056657?utm_source=copy  版權宣告：本文為博主原創文章，轉載請附上博文連結！
 

   
 
  

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:spring/applicationContext-tx.xml","classpath:spring/applicationContext-service.xml","classpath:spring/applicationContext-dao.xml"})
public class TaskInfoTest {
    @Autowired
 TaskService taskService;
    @Test
 
 public void test(){
        TaskInfo taskInfo = new TaskInfo();
        taskInfo.setTid(2);
        taskInfo.setTname("taskname");
        taskInfo.setStatus("成功");
        taskInfo.setBtime("2018-10-12");
        taskInfo.setEtime("2018-10-15");
        taskService.add(taskInfo);
    }
}